13results about How to "Rich microporous structure" patented technology

This invention discloses a special consumable for a double-layer cat litter box and its preparation and usage method, relating to the field of pet cleaning products technology. The invention's upper layer of cat litter and lower layer of absorbent and deodorizing granules, through synergistic design of formula and process, form a complete pet excrement treatment system. The upper layer of cat litter is responsible for trapping and encapsulating feces and draining urine, while the lower layer of absorbent and deodorizing granules is responsible for absorbing and treating odors generated by urine and feces. The combined use of these two layers achieves a highly efficient usage mode with automatic urine seepage, direct feces removal, no need for stirring the upper layer, and regular replacement of the lower layer. This significantly simplifies daily maintenance procedures, reduces the labor intensity of pet ownership, and significantly improves the user experience for family pet cat owners.

The application belongs to the technical field of carbonyl sulfur hydrolysis catalysts, and discloses a high-efficiency sulfur-resistant catalyst for carbonyl sulfur hydrolysis, a preparation method and application thereof.The preparation method comprises the following steps: (1) preparing a porous ceramic carrier containing alumina, titanium dioxide and zirconium dioxide; (2) in-situ growing a metal organic framework material containing lanthanum, bismuth and cerium on the surface of the porous ceramic carrier by using a solvothermal method; (3) performing a calcination treatment on the porous ceramic carrier loaded with the metal organic framework material in an oxygen-containing atmosphere to obtain a catalyst precursor; and (4) performing a reducing gas plasma bombardment treatment on the catalyst precursor to obtain the high-efficiency sulfur-resistant catalyst.The high-efficiency sulfur-resistant catalyst has high-efficiency low-temperature activity, excellent sulfur resistance and long service life.

The present invention relates to a high-entropy hydrotalcite-modified carbon fiber photothermal conversion material and a preparation method thereof. The technical scheme is: in a nitrogen or argon atmosphere, the waste fabric is heat-treated at a temperature of 300 to 700°C for 120 to 300 minutes to obtain a carbon fiber with a porous structure; then the metal salt is mixed in an equimolar ratio and stirred at 100 to 200°C for 10 to 25 minutes to obtain a mixed salt melt; then the carbon fiber with a porous structure is immersed in the mixed salt melt for 10 to 30 minutes, taken out, washed with water, and dried to obtain a high-entropy hydrotalcite-modified carbon fiber photothermal conversion material. The present invention has the characteristics of short production cycle, simple process, low cost, cheap and easy-to-obtain raw materials, and large-scale production. The prepared high-entropy hydrotalcite-modified carbon fiber photothermal conversion material has excellent photothermal conversion efficiency and high water evaporation rate.

The utility model discloses a high-ammonia-nitrogen wastewater treatment device based on a zeolite and MBR combined process. The high-ammonia-nitrogen wastewater treatment device comprises an adjusting tank, a biochemical reaction tank, an MBR membrane tank, a reflux tank and a water producing tank, the interior of the biochemical reaction tank is divided into an anoxic zone and an aerobic zone by a first partition plate, a submersible stirrer is arranged in the anoxic zone, an aeration device is arranged in the aerobic zone, zeolite particles are filled in the anoxic zone, a grid mesh for intercepting the zeolite particles is arranged at an overflow port of the aerobic zone, and an MBR membrane assembly is arranged in the MBR membrane tank; the regulating tank is connected with the biochemical reaction tank through a lifting pump and a lifting pipeline, the anoxic zone, the aerobic zone, the MBR membrane tank and the reflux tank are in overflow connection in sequence, the reflux tank is connected with the anoxic zone through a reflux pump and an external reflux pipeline, and the MBR membrane assembly is connected with the water producing tank through a water producing pump and a water producing pipe. The device can improve the treatment efficiency and treatment effect of the ammonia-nitrogen wastewater and improve the effluent quality.

The invention relates to a metal palladium and sulfur loaded carbon-based catalyst and a preparation method and application thereof, the catalyst contains a porous carbon material, sulfur and palladium, the content of the sulfur is 0.2-5.0 wt%, and the content of the palladium is 0.2-5.0 wt% based on the total weight of the catalyst; the palladium is loaded on the porous carbon material in the form of monatomic palladium and / or cluster palladium. The catalyst disclosed by the invention is used for preparing hydrogen peroxide through an electro-catalytic oxygen reduction reaction, has excellent catalytic activity and is relatively high in hydrogen peroxide selectivity.

The application relates to a kind of graphite-like capacitor carbon and its preparation method and application, relate to carbon material technical field, solve the problem that the needle coke-based capacitor carbon in the activation pore-forming process of prior art is difficult to consider high specific surface area, layered ordered graphite structure keeps, pore size structure uniform control and continuous electric conduction network, leading to the specific capacitance, rate performance and cycle stability of material are limited.The application is by mixing needle coke powder and chemical activator, first activation is carried out by heating, and the activated product is obtained, and the intermediate product A is obtained by post-processing;Intermediate product A is mixed with catalytic activator, second activation is carried out by heating, and catalytic graphitization product is obtained, and the intermediate product B is obtained by post-processing;The intermediate product B is calcined to obtain graphite-like capacitor carbon by refining treatment.The graphite-like capacitor carbon provided by the application can be applied to the preparation of supercapacitors, and the synergistic balance between high specific surface area, high packing density, excellent conductivity and structural stability is realized.

The invention relates to the technical field of preparation of active carbon materials, in particular to a method for preparing a biomass porous carbon material through a coupling activation method and application of the biomass porous carbon material. The preparation method comprises the following steps: by taking waste biomass such as cassava peel as a raw material, performing fermentation, acid leaching activation, low-temperature carbonization, alkali activation, ultrasonic acid pickling and high-temperature impurity removal to obtain the biomass-derived porous carbon material, and performing electron microscope analysis and pore detection on the biomass-derived porous carbon material prepared by the steps. The biomass derived porous activated carbon material is of a porous layered structure and has abundant micropores and mesopores; according to the present invention, the electrochemical test experiment detection results show that the biomass derived porous carbon material has excellent capacitance performance, and when the current density is 0.5 A / g, the specific capacity value range is 200-400 F / g; the material also has good stability, the biomass derived porous carbon material is assembled into a symmetric supercapacitor, and after 10000 circles of stability tests, the retention rate of the specific capacitance of the symmetric supercapacitor can be maintained to be 90% or above.

This invention discloses a method for preparing porous ZIF-type metal-organic framework materials for adsorbing perfluorinated compounds. Using methanol as the reaction solvent, controlled crystallization is achieved through room temperature stirring, isothermal aging, centrifugal washing, and vacuum drying to prepare porous metal-organic framework adsorbent materials. The preparation process of this invention is simple, the reaction conditions are mild, and the post-processing is straightforward. The three obtained ZIF materials exhibit excellent adsorption performance for PFOA in water, with ZIF-8 achieving a maximum PFOA adsorption capacity of 637.8 mg / g. The adsorption kinetics conform to a pseudo-second-order kinetic model, with a correlation coefficient R0. 2 With a viscosity exceeding 0.99, its adsorption performance is significantly superior to traditional adsorbents such as activated carbon and zeolite. The material prepared in this invention has significant application value in the deep removal of perfluorinated organic pollutants from industrial wastewater and drinking water.

The invention belongs to the technical field of high-performance polymer materials and advanced micro-packaging, and relates to a hyperbranched polyimide embedding material as well as a preparation method and application thereof. The method comprises the following steps: dropwise adding a prepared hyperbranched polyimide solution with an active group as a terminal group into a functional material to be embedded, and carrying out suction filtration and drying to obtain embedded powder; the obtained embedding powder is placed in a supercritical carbon dioxide device, the hyperbranched polyimide embedding material generates a large number of pores by regulating and controlling the temperature, pressure and time and utilizing the swelling, plasticizing and extremely strong permeation and diffusion capabilities of supercritical carbon dioxide to hyperbranched polyimide with active groups, the specific surface area of the material is increased, and the hyperbranched polyimide embedding material is prepared. Finally, the composite material with a porous structure, high embedding rate and well protected activity of functional substances is obtained. According to the hyperbranched polyimide embedding material prepared by the method, the stability of functional substances can be improved, and the compatibility with an addition system can also be improved.

The invention discloses a nitrogen-doped porous carbon material which is prepared by taking a nitrogen-containing compound as a nitrogen source and EDTA (Ethylene Diamine Tetraacetic Acid) metal salt as an activating agent and a carbon source through pyrolysis. Through the synergistic effect of the nitrogen source and the EDTA metal salt, carbon skeleton construction, nitrogen atom in-situ doping and pore self-activation are synchronously achieved, the problems that an existing nitrogen-doped porous carbon preparation process is complex, and adsorption performance and selectivity are difficult to consider at the same time are solved, the material can be efficiently used for CO2 capture in industrial flue gas and other scenes, and the application prospect is wide. The method has a wide industrial application prospect.

The invention provides a heterocyclic spice controlled and slow-release type MOFs (Metal-Organic Frameworks) material as well as a preparation method and application thereof, and belongs to the technical field of spices and essences. The MOFs material with specific pore environment, pore diameter and pore volume is prepared by regulating and controlling the ratio of the raw materials, and the prepared MOFs material has high perfume adsorption capacity and can be slowly released at room temperature. Wherein the 300nm ZIF-67 has the best adsorption effect (1083mg / g), still has the retention rate of 62.2% after being placed at normal temperature for 20 days, and only releases 6.3% within 60 minutes at the high temperature of 80 DEG C. The MOFs material prepared by the invention has excellent adsorption and slow release effects on representative heterocyclic perfume 3-acetylpyridine.

The invention discloses a preparation and forming method of a titanium lithium ion sieve. The preparation and forming method of the titanium lithium ion sieve comprises the following steps: (S1) calcining and dehydrating industrial-grade metatitanic acid to obtain anatase titanium dioxide; (S2) carrying out solid-phase reaction on the anatase titanium dioxide and the reaction material lithium carbonate under a molten salt medium to obtain an ion sieve precursor lithium titanate; (S3) carrying out acid leaching on the ion sieve precursor lithium titanate, centrifuging, drying and grinding to obtain metatitanic acid ion sieve powder; and (S4) mixing the metatitanic acid ion sieve powder, an adhesive, a pore-forming agent and an organic solvent, dispersing the mixture into a water phase, and carrying out pickling impurity removal and neutralization treatment to obtain the metatitanic acid ion sieve composite particles. The method has the advantages that the ion sieve precursor lithium titanate grows in the molten salt medium during high-temperature calcination so as to inhibit grain aggregation, the titanium loss generated by the metatitanic acid ion sieve composite particles during brine lithium extraction only causes grain size reduction, but the original layered structure is not changed, and the recovery operability is improved.

The invention belongs to the technical field of electronic-grade trimethylsilane, and particularly relates to a purification method and application of electronic-grade trimethylsilane. Comprising the following steps that S1, a trimethylsilane raw material and diluent gas are mixed and introduced into an adsorption tower, components with the boiling point similar to that of trimethylsilane are removed, a trimethylsilane crude product is obtained, and filler of the adsorption tower is a mixture of activated carbon and metal oxide; and S2, introducing the trimethylsilane crude product into a light component removal tower to remove light components, and then introducing the trimethylsilane crude product into a heavy component removal tower to remove heavy components so as to obtain the electronic-grade trimethylsilane. Impurity components such as dimethylsilane in the trimethylsilane raw material, which are similar to the boiling point of the trimethylsilane, are reduced in the content of the components such as the dimethylsilane through the adsorption tower. Diluting gas is added before the trimethylsilane raw material is introduced into the adsorption tower, so that the heat release effect during adsorption is reduced, and disproportionation reaction is avoided. Meanwhile, the added metal oxide in the filler has a synergistic effect with the diluted gas, so that the adsorption heat release is reduced.